feat(release): select runtime versions by minor

[SuperMarioYL]

Support Minor- and Patch-level Runtime selectors in version.ini.

For each selector, Runtime discovery now:

1. matches parsed versions within the requested Minor or Patch range;
2. prefers stable > rc > nightly;
3. selects the highest complete version in that channel;
4. expands only the legal variants of the winning version.
   Behavior

• X.Y selects one complete version from the entire Minor line.
• X.Y.Z limits selection to one Patch line.
• Higher-channel priority wins before version recency.
• Variants are never backfilled from another version or channel.
• 310P filtering and A5 blocked reporting run after winner selection.
• Overlapping selectors such as 0.26,0.26.0 fail during configuration parsing.
• Explicit version@tag pins must be published, match the product tag grammar, and fall inside the declared range.
• Formal pinned candidates now record the tag's actual complete version and channel.
• /ucm-build image keeps its existing opaque-tag behavior.
• Candidate and selection field sets and schema versions are unchanged.